Trigonometric Ratios
This lesson covers the identification of sine, cosine, and tangent of an acute angle. It explains how to apply these trigonometric ratios to solve problems involving distances and lengths in right-angled triangles. The relationship between the sides and angles of triangles is also discussed.
- 00:00 “Hello, my name is Oyase, Sunday I'll be taking you mathematics for JSS3 and we have an interesting topic for today, which is trigonometry, an aspect of our measurement and geometry. And the question is what to be the foc...”
- 14:14 “that is given, then your hypotenuse. So, I could read, you could know, the particular one to apply. They are designed to cause all the time. Thank you very much. We've come to the end of the class. My name is Oyase Sunda...”
- 10:10 “I have what's my tan. I would just simply say my tan 35 degree. My tan 35 degree from this. My tan 35 degree would just simply give me 35 degree would give me what's my BC. My BC is what? X from the diagram. My BC is X....”
Introduction to Trigonometry
This lesson covers the basic concepts of trigonometry, including the measurement of angles and the definition of trigonometric functions. It explains the types of angles, the use of protractors for measuring angles, and the concept of quadrants in relation to angles. The lesson also introduces plane
- 26:04 “And when we do that, we apply the same concept in solving it using the concept of radian and degree relations. So we have the following exercises we can solve. Convert the following radian measure to degrees and convert...”
- 10:58 “To-- let me call it y degree. So we call this 1. We call this 2. So how do we do this? Quickly, we say that 20 degrees to-- we recall that pi radian equal to 180 degrees. Pi radian equal to 180 degrees. So therefore, if...”
- 12:33 “2 here, we have 4. And 2 here, we have 90. And again, we can go with 2 here, we have 2. And 2 here, we have 45. And we again, 2 here, 1. And 2 here, we have 22.5 or 22, 1 over 2. So that means pi over 8. Look as a pi ove...”
Rational and Non-Rational Numbers
This lesson covers the identification of rational and non-rational numbers. It explains the characteristics of different number sets, including natural numbers, whole numbers, and integers. The lesson also discusses the significance of the number PI in relation to circles.
- 12:38 “That's commonly used. That O to have, but it's not that it has a specific value. But for the purpose of computation, for the purpose of computation, we'll decide to represent pie to be 22 over seven. Because when you die...”
- 19:01 “Now, with these two examples, we will give you an idea to what pi equation or pi really means. Now, you have some questions, which I expect you to do. You have said calculate 16 divided by 9 in 3 decimal places. 16 divid...”
- 15:51 “When you divide it by 20, when you bring out your calculator and you divide this by 20, you are expected to have your pie to be 1. 3.1416, 3.1416, 3.1416. Now, that becomes my value when you divide it on your calculator....”